new x800gt cs fps drop

This morning i installed my new video card ATI x800gt 256mb .. and before my cs only set to 60fps .. but somehow once i installed this card my fps jumped up to 100 ( vsync on ). And it is not smooth and fps jumps around between 60 - 90 a lot ... I got the latest driver... so any ideas of how to fix this ? thks

ok.. i tried all the possible settings in the control panel .. none of that helps ... everytime when there r more ppl running around or gunfire .. my choke will goes up and fps drop ... ( even demos ) ... im wondering will reformat solves this problem ?

There should be no reason for this. You are running a nice card with plenty of RAM. My computer runs CS very well, even with the lack of RAM, which will make it run way better. CS is very weird about hardware. As for V-sync: leave that off. I never get any ripping. Try turning down the resolution, or grab a copy of HLtoolz for some serious tweaking. Happy gaming!